prison camp vs prisoner of war camp

prison camp and prisoner of war camp both are nouns.

Word	Noun	Adjective	Verb	Adverb
prison camp	Yes	No	No	No
prisoner of war camp	Yes	No	No	No

As nouns, prison camp and prisoner of war camp are synonyms defined as:

Other synonyms of prison camp include internment camp, POW camp.

prison camp (noun)	prisoner of war camp (noun)
a camp for trustworthy prisoners employed in government projects	a camp for prisoners of war
a camp for prisoners of war